This James S. Lucas is my 2x great-grandfather. He is listed from Snow Show, PA on the list of PA Civil War Reunion List.
I don't list a son named 'James' so may not be your relative.
I moved to AZ from PA 30 yrs ago. The 'James Lucas' listed here fought in the U.S.-Mexican War 1846-1848. Part of Mexico became AZ, there were Indians in Mexico then and there still are Indian tribes here names Navajo, Papago, etc. James may have picked up that name of 'Indian James' while here then. AZ just became a U.S. State in 1912 and we are this year 2012 celebrating 100 years of being a 'state.'
My genealogy notes for him are these: "1850 census I cannot find James with his parents or with Isabella, they married 1851.

The SURVIVORS OF THE 149TH PENNSYLVANIA VOLUNTEER INFANTRY, COL. JOHN IRVIN'S REGIMENT WILL HOLD THEIR REUNION AT GETTYSBURG ON OCT 8 THIS YEAR.

The Pennsylvania Railroad will sell excursion tickets for single fare for round trip from all parts of the State.

Companies 'B' and 'E' were recruited from this county, the former (b) from Curwensville and the latter (E) from Clearfield.
The following is the roster of Company 'E', as prepared by W.R. Johnston, Secretary of the Regimental Association:
(Jan Tracey copied the following names from this Reunion Announcement, this is on the Clearfield PA website 2004):

The war was initiated when the U.S., already having border disputes with Mexico, sent 4,000 troups to the Rio Grande (or Rio Bravo as it is known in Mexico). On the heels of that move, U.S. President James Polk proposed that Mexico sell its northern half to the U.S. Hostilities commenced and the U.S. crossed the border to occupy Matamoras. Soon after, U.S. warships attacked Veracruz and landed troops, who fought their way overland to Mexico City. Santa Anna led a defending army, but the Mexicans were overwhelmed. In the Treaty of Guadalupe Hidalgo, virtually dictated by the U.S., Mexico agreed to sell its northern territories to the victor for $15 million.

For Mexico, the war was a traumatic event that resulted in the loss of many lives, half its territory and a great deal of pride and hope for the future. At the same time, Komatsu says, it brought together a people who still were struggling with what it meant to be Mexican, just 20 years after achieving independence from Spain.

Mexican War
It was clear by the mid 1800's that the United States wanted to extend its borders to the Pacific Ocean.

Texas was annexed in 1845 and the subsequent border dispute with Mexico helped fuel Congress' declaration of war in May of 1846.

This war helped the United States gain territory in what we now call the Southwest which includes Arizona, New Mexico, California, Nevada, Utah and parts of Colorado.

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